///
module Rx {
export interface Observable {
/**
* Returns the maximum value in an observable sequence according to the specified comparer.
* @example
* var res = source.max();
* var res = source.max(function (x, y) { return x.value - y.value; });
* @param {Function} [comparer] Comparer used to compare elements.
* @returns {Observable} An observable sequence containing a single element with the maximum element in the source sequence.
*/
max(comparer?: _Comparer): Observable;
}
}
(function () {
var o : Rx.Observable;
var a : Rx.Observable;
o = o.max();
o = a.max((x, y) => x.length - y.length);
});